[yahr-muh
l-kuh, -muh-, yah-] 
| a skullcap worn, esp. during prayer and religious study, by Jewish males, esp. those adhering to Orthodox or Conservative tradition. |
| yar·mul·ke also yar·mel·ke (yär'məl-kə, yä'məl-) n. A skullcap worn by Jewish men and boys, especially those adhering to Orthodox or Conservative Judaism. [Yiddish, from Polish and Ukrainian yarmulka, possibly from Turkish ya  murluk, rain clothing, from yamur, rain.] |
In Orthodox Judaism and Conservative Judaism, a skullcap worn by men as a sign of reverence while praying to God or talking about him.